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首页> 外文会议>Conference on X-Ray and Gamma-Ray Instrumentation for Astronomy XI 2-4 August 2000 San Diego, USA >The Burst Alert Telescope (BAT) on the Swift MIDEX mission
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The Burst Alert Telescope (BAT) on the Swift MIDEX mission

机译：Swift MIDEX任务中的爆炸警报望远镜（BAT）

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摘要

The Burst Alert telescope (BAT) is one of 3 instruments on the Swift MIDEX spacecraft to study gamma-ray bursts (GRBs). The BAT instrument is the instrument that first detects the GRB and localizes the burst directiont o an accuracy of 1-4 arcmin within 10 sec after the start of the event. These locations cause the spacecraft to autonomously slew to point the two narrow-FOV instruments at the burst location within 20-70 sec to make follow-up x-ray and optical observations. BAT is a wide-FOC coded-aperture instrument with a CdZnTe detector plane. The detector plane is composed of 32,768 pieces of CdZnTe (4x4x2mm), and the coded-aperture mask is composed of approx50,000 piexes of lead (5x5x1mm) with a 1-m separation between mask and detector plane. The BAT operates voer the 10-150 keV energy range with approx7 keV resolution a sensitivity of 0.2 ph/cm~2-sec, and a 1.4 sr (half-coded) FOV. We expect to detectapprox300 GRBs/yr for a 3-year msision. The BAT also performs an all-sky hard x-ray survey with a sensitivity of appxor 1 mCrab (systematic limit) and as a hard x-ray transient monitor.
机译：爆炸警报望远镜（BAT）是Swift MIDEX航天器上用于研究伽马射线暴（GRB）的3台仪器之一。 BAT仪器是在事件开始后的10秒钟内首先检测GRB并以1-4 arcmin的精度定位突发方向的仪器。这些位置使航天器在20-70秒内自动旋转以将两个窄FOV仪器指向爆炸位置，以进行后续X射线和光学观察。 BAT是具有CdZnTe检测器平面的宽FOC编码孔径仪器。探测器平面由32,768片CdZnTe（4x4x2mm）组成，而编码孔径掩模由大约50,000铅的引线（5x5x1mm）组成，掩模与探测器平面之间的距离为1m。 BAT的工作电压范围为10-150 keV，分辨率约为7 keV，灵敏度为0.2 ph / cm〜2秒，FOV为1.4 sr（半编码）。我们希望在3年内每年检测大约300个GRB。 BAT还执行灵敏度为1 mCrab（系统极限）的全天候硬X射线测量，并作为硬X射线瞬态监测器。

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